<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
.main  div{
float: left;
margin: 10px;
}
.circular1{
width: 200px;
height: 200px;
background-color: red;
border-radius: 50%;
}
.circular2{
width: 200px;
height: 100px;
background-color: green;
border-radius: 100px 100px 0 0;
}
.circular3{
width: 100px;
height: 200px;
background-color: pink;
border-radius: 100px 0 0 100px;
}
.circular4{
width: 200px;
height: 200px;
background-color: gainsboro;
border-radius: 200px 0 0;
}
.circular5{
width: 200px;
height: 200px;
border-left: 10px solid blue;
border-radius: 200px 0 0;
}
.circular6{
width: 200px;
height: 200px;
border-top: 10px solid blue;
border-radius: 200px 0 0;
}
.circular7{
width: 200px;
height: 200px;
border: 10px solid blue;
border-radius: 200px;
}
.circular8{
width: 100px;
height: 200px;
background-color: green;
border-radius: 50%/100% 100% 0 0;
}
</style>
</head>
<body>
<div class="main">
<div class="circular1"></div>
<div class="circular2"></div>
<div class="circular3"></div>
<div class="circular4"></div>
<div class="circular5"></div>
<div class="circular6"></div>
<div class="circular7"></div>
<div class="circular8"></div>
</div>
</body>
</html>